Question 17N.3.SL.TZ0.06
| Date | November 2017 | Marks available | [Maximum mark: 5] | Reference code | 17N.3.SL.TZ0.06 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Explain, Label, Outline | Question number | 06 | Adapted from | N/A |
The image shows a human ear.
[Source: Leonello/iStock]
Using the letter M, label the structures which detect movement of the head.
[1]
Example of answer for part (a)(i)
The candidate should label the semicircular canals
Line with the letter M is expected but accept the letter M on diagram if clearly indicating the correct structure
Using the letter A, label where sound is amplified.
[1]
Example of answer for part (a)(ii)
The candidate should label the bones/ossicles in middle ear
Line with the letter A is expected but accept the letter A on diagram if clearly indicating the correct location
Explain the function of the cochlea in hearing.
[2]
a. sound «waves» enters the ear causing fluid in the cochlea to move/vibrate
b. «movement of fluid in cochlea» causes the hair cells to move
c. «details of hair cell movement» is transmitted to brain via the auditory nerve
[Max 2 Marks]
Outline how the hearing of a deaf or partially deaf person could be improved.
[1]
hearing aid/cochlear implant
Answer must refer to ear, not for example just “operation”
Accept other valid answers
